WO2017153265A1 - Verfahren zur wärmebehandlung eines flachproduktes aus stahl, wärmebehandeltes flachprodukt aus stahl sowie seine verwendung - Google Patents

Verfahren zur wärmebehandlung eines flachproduktes aus stahl, wärmebehandeltes flachprodukt aus stahl sowie seine verwendung Download PDF

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Publication number
WO2017153265A1
WO2017153265A1 PCT/EP2017/054985 EP2017054985W WO2017153265A1 WO 2017153265 A1 WO2017153265 A1 WO 2017153265A1 EP 2017054985 W EP2017054985 W EP 2017054985W WO 2017153265 A1 WO2017153265 A1 WO 2017153265A1
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WO
WIPO (PCT)
Prior art keywords
hardness
flat product
section
thickness
edge
Prior art date
Application number
PCT/EP2017/054985
Other languages
German (de)
English (en)
French (fr)
Inventor
Peter Ohse
Stefan Wischmann
Jens Plha
Thorsten KRENKE
Stefan Kranz
Original Assignee
Thyssenkrupp Steel Europe Ag
Thyssenkrupp Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thyssenkrupp Steel Europe Ag, Thyssenkrupp Ag filed Critical Thyssenkrupp Steel Europe Ag
Priority to CA3014133A priority Critical patent/CA3014133A1/en
Priority to KR1020187028610A priority patent/KR20180121956A/ko
Priority to US16/083,100 priority patent/US20190085425A1/en
Priority to EP17710845.3A priority patent/EP3426808B1/de
Priority to MX2018010919A priority patent/MX2018010919A/es
Publication of WO2017153265A1 publication Critical patent/WO2017153265A1/de

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/42—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for armour plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
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    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/02—Edge parts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C2202/00—Physical properties
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
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Definitions

  • the invention relates to a method for heat treatment of a flat product made of steel. Furthermore, the invention relates to a heat-treated steel flat product and its use.
  • multi-layer steels which are composed of at least two steel layers and at least one combination of a hard and a second steel with high ductility, wherein the hard steel should destroy the impacting object and the more ductile steel should absorb the resulting energy of the impact.
  • the prior art discloses various methods for producing generic multilayer steels which are clad (for example DE 21 42 360 A), for example by means of explosive cladding (eg US 6,360,936, DE 692 02 131 T2), which is very high is cost-intensive, by means of hot-roll cladding (eg EP 2 123 447 A1) or by roll cladding using a heat source (eg DE 44 29 913 C1). All plating methods have in common that the semi-finished products to be plated have to be processed at their connection surfaces consuming and thus cost-intensive (see, for example, DE 43 44 879 C2, DE 10 2005 006 606 B3) to secure
  • the exemplified, plating methods are also suitable for the production of other components that are designed not only for ballistic purposes, but for example for components in areas that are exposed to high abrasive influences and thus high wear protection properties require (see, eg, DE 10 2005 006 606 B3). There is further room for improvement with respect to the prior art.
  • the invention had the object of providing a method for heat treatment of a flat product made of steel, which overcomes the disadvantages of the known prior art, can be economically and easily implemented in particular with comparable results, a heat-treated flat product and a corresponding use specify.
  • the object is achieved in that a method according to the invention for the heat treatment of a flat product made of steel is specified, which comprises the following steps:
  • Cooling of the at least partially heated flat product so that at least partially a microstructure adjusts with a second hardness in the flat product, which has a higher hardness compared to the structure with the first hardness, wherein the heating and cooling of the flat product are matched to one another in that the microstructure with the second hardness forms in sections over the thickness of the flat product and, at least in one section over the thickness of the flat product, the microstructure with the first hardness remains.
  • the inventors have found that by targeted heat treatment of a monolithic flat steel product different properties across the thickness of the flat product can be adjusted, which so far only by a
  • Multi-layer construction could be provided.
  • the method according to the invention can also have no problems with regard to
  • a variable hardness profile over the thickness of a monolithic steel material can be specifically set with the invention.
  • Microstructures having a first hardness essentially mean the starting structure of the flat product as received prior to the heat treatment according to the invention. Hardness in the structure with the first hardness or second hardness, etc. is to be understood as hardness averages over the respective sections. Under
  • Austenitizing temperature is a temperature of at least A cl (austenite start temperature), particularly preferably at least A c3 (austenite final temperature) to understand the specified temperature values A cl , A c3 and martensite and start temperature M s are dependent on the material and can be based on appropriate alloy composition with good accuracy estimate.
  • Heat input into the flat product can be taken from both sides. In particular, this allows the depth of the heat treatment within the flat product to be controlled in sections, with complete throughheating of the flat product, in particular the core section to be prevented. Due to the two-sided heating with subsequent cooling, hard edge sections can be set with a ductile core section. Depending on the depth of the heat treatment, it is advantageously possible to set a symmetrical or asymmetrical hardness profile over the thickness of the flat product.
  • Coupling distance also determines the penetration depth in addition to the frequency.
  • the optimum setting with regard to working frequency, distance and heat treatment depth depends on the product to be manufactured and can be determined relatively easily by means of simulation and / or "trial and error tests".
  • at least one edge portion of the flat product is heated during heating to at least a temperature of at least A c3 + 20 K and held at this temperature for at least 1 s to a maximum of 60 s. At this temperature and holding period it can be ensured that the area to be hardened within the flat product is also completely austenitized, ie that the structure is completely converted into austenite, at least in the edge region.
  • a tempering portion having a structure having a fourth hardness is set, which in particular has a lower hardness as the section having the structure of the first hardness.
  • the tempering section with its lower hardness and higher ductility compared to the adjacent sections, provides an improvement in terms of ballistic properties and further processing.
  • a flat product made of steel which is ferromagnetic, which can preferably be heat-treated inductively.
  • the flat steel product can be produced in the hard-rolling state as a result of its production, ie. H. that no heat treatment, in particular no recrystallization annealing, has been carried out on the flat product after the last rolling pass.
  • the flat steel product can be produced in the hard-rolling state as a result of its production, ie. H. that no heat treatment, in particular no recrystallization annealing, has been carried out on the flat product after the last rolling pass.
  • the flat steel product can be produced in the hard-rolling state as a result of its production, ie. H. that no heat treatment, in particular no recrystallization annealing, has been carried out on the flat product after the last rolling pass.
  • the flat steel product can be produced in the hard-rolling state as a result of its production, ie. H. that no heat treatment, in particular no recrystallization anne
  • HV is the Vickers hardness and the hardness test is regulated in DIN EN ISO 6507-1: 2006-03.
  • the steel flat product preferably consists of the following alloy constituents in% by weight:
  • the invention relates to a heat-treated
  • a structure having a second hardness is formed in sections over the thickness of the flat product and at least in a section over the thickness of the flat product, a structure having a first hardness is formed, wherein the structure with the second hardness in the Compared to the structure with the first hardness has higher hardness and is heat treated.
  • the microstructure with the second hardness preferably consists essentially of a martensitic or martensite-bainitic microstructure.
  • the section with the structure with the first hardness consists of a starting structure, which the structure in the
  • State of delivery and may consist for example of a ferrite-pearlitic or annealed martensitic structure.
  • the microstructure with the second hardness is formed in an edge portion of the flat product, wherein the layer thickness of the edge portion may amount to at least 5% to a maximum of 80% of the total thickness of the flat product and the remaining thickness of the flat product from the section with the Structure with the first hardness exists.
  • the microstructure with the second hardness is formed in both edge portions of the flat product or on one side of the flat product is an edge portion with a structure having a second hardness and on the other side of the flat product, an edge portion with a structure with a third hardness, wherein the structure having the third hardness has a lower hardness than the structure having the second hardness but a higher hardness than the structure having the first hardness, wherein the layer thickness of the
  • Each edge portion may vary between at least 5% and a maximum of 45% of the total thickness of the flat product and the remaining thickness is formed by the portion having the structure with the first hardness.
  • an asymmetric or symmetrical hardness profile if both edge sections have the same dimension, can be provided individually in a flat product with two "hard” or “harder” sides and one "ductile” or “more ductile” core.
  • the flat product has a hardness difference between the at least one edge section with the structure having the second hardness and / or third hardness and the section having the structure having the first hardness of at least 100 HV10, in particular at least 150 HV10.
  • the flat product has, at least between an edge section with the structure having the second hardness and / or third hardness and the section with the structure having the first hardness, a tempering section having a structure with a fourth hardness, which has a hardness of Has compared to the section with the structure of the first hardness by at least 10 HV10, in particular at least 20 HV10 lower hardness.
  • the flat product has a decarburized edge layer at least in one of the edge sections or has an edge layer with a structure having a fifth hardness, which has a lower hardness compared to the edge section.
  • the decarburized edge layer or the edge layer having the structure with the fifth hardness can up to a thickness of not more than 10%, in particular not more than 5% based on the total thickness of
  • the flat product has a total thickness between 3 and 80 mm, in particular between 6 and 20 mm.
  • the steel flat product is formed from a heavy plate.
  • the invention relates to a use of the
  • Flat product according to the invention which may optionally be converted to a final product and / or trimmed, as part or component of armor or as a part or component with special properties, in particular against the influence of wear influences such as abrasive and / or jet wear.
  • FIG. 1b a representation of the hardness curve over the thickness of the flat product heat-treated in accordance with the first exemplary embodiment
  • Figure 2a shows a second embodiment for heat treatment of a
  • FIG. 2b shows a representation of the hardness curve over the thickness of the flat product heat-treated according to the second exemplary embodiment
  • Figure 3a) is a schematic sectional view of a third
  • Figure 4a is a schematic sectional view of a fourth
  • FIG. 4b a representation of the hardness profile over the thickness of the flat product heat-treated in FIG. 4a
  • FIG. 5b a representation of the hardness profile over the thickness of the flat product heat-treated in FIG. 5a
  • Figure 6a is a schematic section through one after a sixth
  • FIG. 6b a representation of the hardness profile over the thickness of the flat product heat-treated in FIG. 6a
  • the flat product (1) shown in a schematic view.
  • the flat product (1) consists of a ferromagnetic steel having a substantially homogeneous structure with a first hardness (1.1), for example, from a heat treatable
  • the flat product (1) has a length (L), a width, which is not shown here due to the sectional view and for example from the dimension forth is several times smaller than the length (L), and a thickness or total thickness (D) on.
  • the flat product (1) is preferably heat-treated in a continuous process at least regionally, preferably over the entire width of the flat product (1) and at least partially, preferably over the entire length (L) of the flat product (1). As shown in Figure la), the flat product (1), for example, on a roller conveyor (R) and is in the direction of
  • a martensitic or a martensite-bainitic structure (2.2) in the edge section (2) For example, a martensitic or a martensite-bainitic structure (2.2) in the edge section (2).
  • the heating (I) and the cooling (B) of the flat product (1) are matched to one another in such a way that a structure having a second hardness (2.2) extends in sections over the thickness (D) of the
  • the heat treatment unit and / or their units can be arranged individually movable over the flat product.
  • the hardness profile over the thickness of the flat product (10) is shown in FIG. 1b) and shows that the edge section (2) has a structure with a second hardness (2.2) which is higher than the section (1.1). with the structure having the first hardness (1.2), wherein the hardness difference is preferably at least 100 HV10.
  • Flat product (1) shown in a schematic view To avoid repetition, only the differences in comparison with the first embodiment will be explained.
  • the flat product (1) shown on a roller conveyor (R) is, as in FIG. 1a), moved in the direction of a heat treatment unit (W).
  • W heat treatment unit
  • Heat treatment unit (W) facing away is a second
  • Heat treatment unit (W) comprising at least one heat source, preferably at least one inductor ( ⁇ ) for heating the flat product (1) and at least one cooling unit, preferably at least one water shower or shower ( ⁇ ') for cooling the heated flat product (1) ,
  • the heating takes place on both sides in each case via at least one inductor (I, ⁇ ), which preferably extend completely over the width of the flat product, to the entire width of the
  • the heating (I, ⁇ ) and the cooling (B, B ') of the flat product (1) are coordinated such that a microstructure with a second hardness (2.2, 2'.2) sections over the thickness (D) of the flat product (12), namely in the edge sections (2) and at least in a section (1.2) over the thickness (D) of the flat product (16) the structure with the first hardness (1.2) remains, ie the section (1.1 ) is not or not significantly adversely affected by the heat treatment and this forms the core layer (1.1) of the flat product ().
  • the two-sided heat treatment thus takes place at the same time.
  • the heat treatment units can also be arranged offset from one another, whereby the two edge sections can be generated offset in time.
  • the hardness profile over the thickness of the flat product (12) is shown in FIG. 2b) and shows that the edge sections (2, 2 ') have a structure with a second hardness (2.2, 2'.2) which is higher than the section (FIG. 1.2) or the Core layer with the structure of the first hardness (1.2).
  • the hardness difference is at least 100 HV10.
  • FIGS. 3 a), 4 a), 5 a) and 6 a sections are produced by flat products (10) produced according to the invention with those in FIGS. 3 b), 4 b), 5 b) and 6 b)
  • the section (1.1) and the edge sections (2, 2 ') each correspond to 30% of the total thickness (D) of the flat product (12) and in each case a further 5% occupy the starting sections (3, 3'), FIG. 3a).
  • the symmetrical hardness profile across the thickness (D) is shown in FIG. 3b).
  • the difference in comparison with the third exemplary embodiment is that the upper edge section (2) thickens with a structure having a second hardness (2.2) which is, for example, 50% of the total thickness (FIG. D), and the lower edge portion (2 ') with a structure having a second hardness (2'.2) thinner, which corresponds for example to 10% of the total thickness (D) is executed, Figure 4a).
  • the asymmetric hardness profile over the thickness (D) is shown in Figure 4b).
  • a section (1.1) is in particular one
  • the flat product () has in each case a decarburized edge layer in both edge sections (2, 2 ') or in each case has an edge layer (4, 4') with a structure having a fifth hardness (4.2, 4 ' Compared to the edge portion (2, 2 ') has lower hardness.
  • Section (1.1) is 30% and the edge sections (2, 2 ') each correspond to 35% of the total thickness (D) of the flat product (10), the decarburized edge layer or the edge layer (4, 4') up to a maximum thickness of 5 % based on the total thickness (D) of the flat product () may be present, Figure 5a).
  • the symmetrical hardness profile across the thickness (D) is shown in Figure 5b).
  • flat product in a schematic section through a heat-treated according to a sixth embodiment flat product () are a portion (1.1) having a structure with a first hardness (1.2), an edge portion (2) having a structure with a second hardness (2.2) and between the edge portion (2) and section (1.1)
  • Edge portion (2) has a thickness of 60%, of which for the edge layer (4) can account for a maximum of 5%, based on the total thickness (D) of the flat product (), Figure 6a).
  • the asymmetrical hardness profile across the thickness (D) is shown in FIG. 6b).
  • Flat products made of steel due to production in the hard-rolling state as well as alternatively or cumulatively already with a homogeneous initial hardness of, for example, at least 300 HV 10 are used.
  • the flat products according to the invention which may optionally be formed into a final product and / or trimmed, are either as part or component of an armor or as part or

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PCT/EP2017/054985 2016-03-10 2017-03-03 Verfahren zur wärmebehandlung eines flachproduktes aus stahl, wärmebehandeltes flachprodukt aus stahl sowie seine verwendung WO2017153265A1 (de)

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CA3014133A CA3014133A1 (en) 2016-03-10 2017-03-03 Method for thermally treating a flat steel product, thermally treated flat steel product and use thereof
KR1020187028610A KR20180121956A (ko) 2016-03-10 2017-03-03 스틸 평판 제품을 열처리하기 위한 방법, 열처리된 스틸 평판 제품 및 그 용도
US16/083,100 US20190085425A1 (en) 2016-03-10 2017-03-03 Method for thermally treating a flat steel product, thermally treated flat steel product and use thereof
EP17710845.3A EP3426808B1 (de) 2016-03-10 2017-03-03 Verwendung eines wärmebehandelten flachproduktes aus stahl
MX2018010919A MX2018010919A (es) 2016-03-10 2017-03-03 Procedimiento para el tratamiento termico de un producto plano de acero, producto plano de acero tratado termicamente asi como su uso.

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